20884311830 has 8 divisors (see below), whose sum is σ = 37591761312. Its totient is φ = 8353724728.

The previous prime is 20884311829. The next prime is 20884311863. The reversal of 20884311830 is 3811348802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20884311830² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044215582 + ... + 1044215601.

It is an arithmetic number, because the mean of its divisors is an integer number (4698970164).

Almost surely, 2^20884311830 is an apocalyptic number.

20884311830 is a deficient number, since it is larger than the sum of its proper divisors (16707449482).

20884311830 is a wasteful number, since it uses less digits than its factorization.

20884311830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088431190.

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 20884311830 in words is "twenty billion, eight hundred eighty-four million, three hundred eleven thousand, eight hundred thirty".